Add confirm() prototype.

src/syncterm/uifcinit.h

@@ -9,5 +9,6 @@ extern	uifcapi_t uifc; /* User Interface (UIFC) Library API */
 int	init_uifc(BOOL scrn, BOOL bottom);
 void uifcbail(void);
 void uifcmsg(char *msg, char *helpbuf);
+int confirm(char *msg, char *helpbuf);
 
 #endif